Abstract: Methods and systems are provided for mitigating engine pre-ignition based on a feed-forward likelihood of pre-ignition and feedback from a pre-ignition event. In response to an indication of pre-ignition, a cylinder may be enriched while an engine load is limited. The enrichment may be followed by an enleanment to restore exhaust catalyst feed-gas oxygen levels. The mitigating steps may be adjusted based on engine operating conditions, a pre-ignition count, as well as the nature of the pre-ignition.
Type:
Grant
Filed:
December 1, 2011
Date of Patent:
September 11, 2012
Assignee:
Ford Global Technologies, LLC
Inventors:
John Eric Rollinger, Robert Roy Jentz, Robert Sarow Baskins, Chris Paul Glugla, Karen Willard
Abstract: Methods and systems are provided for mitigating engine pre-ignition based on a feed-forward likelihood of pre-ignition and feedback from a pre-ignition event. In response to an indication of pre-ignition, a cylinder may be enriched while an engine load is limited. The enrichment may be followed by an enleanment to restore exhaust catalyst feed-gas oxygen levels. The mitigating steps may be adjusted based on engine operating conditions, a pre-ignition count, as well as the nature of the pre-ignition.
Type:
Grant
Filed:
August 5, 2010
Date of Patent:
December 6, 2011
Assignee:
Ford Global Technologies, LLC
Inventors:
John Eric Rollinger, Robert Roy Jentz, Robert Sarow Baskins, Chris Paul Glugla, Karen Willard
Abstract: Various methods and systems are provided for regenerating an exhaust gas recirculation cooler. One example method includes, routing exhaust gas from a donor cylinder group of an engine to an intake passage of the engine through the exhaust gas recirculation cooler, routing exhaust gas from a non-donor cylinder group of the engine to an exhaust passage of the engine, and adjusting fuel distribution among the donor cylinder group and the non-donor cylinder group responsive to a temperature of the exhaust gas recirculation cooler.
Type:
Grant
Filed:
June 17, 2011
Date of Patent:
December 2, 2014
Assignee:
General Electric Company
Inventors:
Adam Klingbeil, Roy Primus, Michael Easter, Eric David Peters
Abstract: Various methods and systems are provided for regenerating an exhaust gas recirculation cooler. One example method includes, initiating an EGR cooler regeneration mode, wherein the EGR cooler regeneration mode comprises changing a fuel distribution of a donor cylinder group relative to a non-donor cylinder group of an engine, and increasing at least one of engine speed or load of the engine.
Type:
Grant
Filed:
May 14, 2012
Date of Patent:
December 2, 2014
Assignee:
General Electric Company
Inventors:
Eric David Peters, Roy Primus, Paul Lloyd Flynn, John Stephen Roth, Franz-Joseph Foltz, James Robert Mischler, Luke Henry, Roshan Shekhar Kotian, Michael Easter, Stephen Mark Geyer
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